Super easy

Algebra Level 2

Let ab=1ab=1 and define

P=aa+1+bb+1 and Q=1a+1+1b+1. P=\frac{a}{a+1}+\frac{b}{b+1}\quad \text{ and }\quad Q=\frac{1}{a+1}+\frac{1}{b+1}.

What can we say about PP and Q?Q?

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